Class reference from parsing a string?

Say I have a model class called Game. I also have a string call 'game'.
How can I do some parsing magic on the string to have a reference to
the model Game. So I can perform class methods. (Game.find(1))

thanks

'game'.camelize.constantize.find 1

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Vary dangerous, you need to be sure what is inside this string.
it's like the notorious Eval.